dirty word vs filth

dirty word and filth both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirty word	Yes	No	No	No
filth	Yes	No	No	No

As nouns, dirty word and filth are synonyms defined as:

Other synonyms of dirty word include obscenity, smut, vulgarism.

dirty word (noun)	filth (noun)
an offensive or indecent word or phrase	an offensive or indecent word or phrase
a word that is considered to be unmentionable	a state characterized by foul or disgusting dirt and refuse
	anything regarded as making something unclean
	any substance considered disgustingly foul or unpleasant